FILE - In this March 26, 2016, file photo, Black Lives Matter activist DeRay Mckesson chats with campaign volunteers in Baltimore. Mckesson, is suing Fox News host Jeanine Pirro, claiming she defamed him while discussing a lawsuit against the Black Lives Matter movement that was later dismissed. The suit, which also names Fox News Network, was filed in New York on Tuesday, Dec. 12, 2017. (AP Photo/Patrick Semansky, File)